Cannot use Server.MapPath

Question

What I must do to make Server.MapPath work?
I have using System.Web;

what else? When I type Server there is no quick result option (intelli-sense) for Server.

Any help?

Guidon

You need to provide more information. What kind of project is this? Why are you wanting to run Server.MapPath? Is this a web-forms project and are you writing code in a Page subclass or in an ASPX's render function? – Cyrilcyrill

C# Winforms.. i want it to check for file availability on the server – Guidon

Answer 1

you can try using this

    System.Web.HttpContext.Current.Server.MapPath(path);

or use HostingEnvironment.MapPath

    System.Web.Hosting.HostingEnvironment.MapPath(path);

Ventriculus

They not working.... Error 1 The type or namespace name 'HttpContext' does not exist in the namespace 'System.Web' (are you missing an assembly reference?) ... Error 2 The type or namespace name 'Hosting' does not exist in the namespace 'System.Web' – Guidon

it looks like your are using winforms, you might wanna see this link then debugging.com/bug/18951 – Ventriculus

Me too, HostingEnvironment.MapPath worked and I am using it outside of a controller. – Outfight

First of all your project needs to reference System.Web.dll and it will work – Bayard

How to get read a file present in this directory "~/AppData/Roaming"? – Nutritious

For my case, HostingEnvironment.MapPath("/MyFolder") returns c:\inetpub\wwwroot\. Need to add HostingEnvironment.MapPath("~/MyFolder") to return the correct path. – Melodiemelodion

Answer 2

Your project needs to reference assembly System.Web.dll. Server is an object of type HttpServerUtility. Example:

HttpContext.Current.Server.MapPath(path);

Ekaterinodar

Cant't find such reference I found only this two: System.Web.ApplicationServices, System.Web.Services.... – Guidon

Answer 3

System.Web.HttpContext.Current.Server.MapPath("~/") gives null if we call it from a thread.

So, Try to use

System.Web.Hosting.HostingEnvironment.MapPath("~/")

Cerell

Answer 4

Firt add a reference to System.web, if you don't have. Do that in the References folder.

You can then use Hosting.HostingEnvironment.MapPath(path);

Writer

Answer 5

bool IsExist = System.IO.Directory.Exists(HttpContext.Current.Server.MapPath("/UploadedFiles/"));
if (!IsExist)
    System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath("/UploadedFiles/"));

StreamWriter textWriter = File.CreateText(Path.Combine(HttpContext.Current.Server.MapPath("/UploadedFiles/") + "FileName.csv"));
var csvWriter = new CsvWriter(textWriter, System.Globalization.CultureInfo.CurrentCulture);
csvWriter.WriteRecords(classVM);

Outspeak

Code-only answers are considered low quality: make sure to provide an explanation what your code does and how it solves the problem. It will help the asker and future readers both if you can add more information in your post. See Explaining entirely code-based answers – Obaza

Answer 6

Try adding System.Web as a reference to your project.

Downpipe

Answer 7

You need to add reference (System.Web) Reference to System.Web

Skeptical

Answer 8

I know this post is a few years old, but what I do is add this line to the top of your class and you will still be able to user Server.MapPath

Dim Server = HttpContext.Current.Server

or u can make a function

Public Function MapPath(sPath as String)
    return HttpContext.Current.Server.MapPath(sPath)
End Function

I am all about making things easier. I have also added it to my Utilities class just in case i run into this again.

Scraggy

Answer 9

I faced the same problem and I guess this might help someone. As the Original Poster of this question asked

What I must do to make Server.MapPath work?
I have using System.Web;

The class which we had written should implement System.Web.UI.Page

Say for example, our classname is MyClass

public class MyClass: System.Web.UI.Page
{
// Code runs here 
}

Trinitrophenol